نتایج جستجو برای: geochemical anomalies
تعداد نتایج: 57431 فیلتر نتایج به سال:
Data on the regional geochemical background and threshold values of heavy metals are required to establish anomalies assess soil pollution. As a rule, average contents elements in natural undisturbed soils, or for study area, obtained by statistical methods. The aim is obtain soils Lower Don Taganrog Bay coast using different approaches. A total 86 topsoil samples were collected from area. conc...
a combination of elements is usually used in reconnaissance geochemical exploration and distribution maps are drawn to identify probable anomalies. in this study, 102 stream sediment samples from the arid environment of mesgaran area, eastern iran, were investigated using r-mode factor analysis. a four-factor model with a cumulative variance of 75.90% clearly indicated group associations of the...
The Damanghor gold mineralization occurrence is located in north of Bardaskan, Khorasan Razavi Province, and Taknar zone.The geology of the area consists of Precambrian green sericite schist and metarhyolite, intruded by diabase. Mineralization in this area is in vein form with N50E stribe and 70NW dip and hosted by schist and metarhyolite with 300 meters length and 2 to 35 meters width. Dissem...
Intrusion of tonalitic, granodioritic and quartz-dioritic igneous bodies of Oligocene age into Cretaceous andesite, andesi-basalt and carbonate rocks led to occurrence of widespread argillic alteration zone, along with skarnification in the northeast of Kharvana (East Azarbaidjan Province, NW Iran). Mineralogical studies indicate that argillic alteration zone includes kaolinite, quartz, alunite...
The Kangareh gabbro body is located in south of the Kurdistan Povince and southwest of the Qorveh area. The area belongs to the Sanandaj-Sirjan zone. Tectonic evolutions during Mezozoic and magmatism, due to subduction of the Neo-Tethys oceanic lithosphere beneath the Iran microplate, led to formation of various igneous bodies in this area. Chemical analysis of pyroxene minerals and whole rock ...
Basalts in the Gasht-Masuleh area crop out in the SW Fuman, Gilan Province, and are exposed in the Jurassic and Late Cretaceous units in this area. Whole rock chemistry shows that the rock samples have Mg numbers between 30 and 31.7. Rare earth element patterns (REE) indicate light REE (LREE) enrichment and heavy REE (HREE) depletion (LaN/YbN= 7.7-9.8). Nb, Ta and Ti negative anomalies in primi...
Abstract Integrated interpretation of regional geochemical data and results the numerical BM&PSM performed at east part Sea Azov northeast Black reveal a correlation between spatial distribution light hydrocarbons in seabed sediments investigated petroleum systems. The obtained point out that gaseous marine reflects geological structure sedimentary cover, maturity systems, located within ba...
The closed nature of geochemical data has been proven in many studies. Compositional data have special properties that mean that standard statistical methods cannot be used to analyse them. These data imply a particular geometry called Aitchison geometry in the simplex space. For analysis, the dataset must first be opened by the various transformations provided. One of the most popular of the a...
Balazard area is located in west of Nehbandan in the center of Lut Block. Eocene andesite and rhyolite cover most of the area. Subvolcanic rocks such as quartz monzodiorite porphyry, biotite quartz diorite porphyry, pyroxene hornblende diorite porphyry, hornblende pyroxene quartz diorite porphyry and hornblende diorite porphyry intruded the volcanic rocks. Evidence such as disseminated sulfide ...
Barandagh quadrangle is located in northeast of Zandjan, and is a part of polymetallic region of Tarem-Zandjan. Field evidence and microscopic studies show an intimate relationship between geochemical anomalies and alteration zones in this area. Based on the field observations and mineralogical studis, these zones, in light of extent, locality, and constituent mineral assemblage, differ fr...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید